Name the Following: a Metallic Oxide Which Reacts with Hydrochloric Acid to Give a Coloured Solution.

Name the following:
A metallic oxide which reacts with hydrochloric acid to give a coloured solution.

One Line Answer

K₂Cr₂O₇ reacts with hydrochloric acid to give a coloured solution.

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General Preparation of Hydrogen Chloride Gas

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Chapter 8: Study of Compounds: Hydrogen Chloride - Exercise 1 [Page 198]

Chapter 8 Study of Compounds: Hydrogen Chloride
Exercise 1 | Q 1.13 | Page 198

The acid on mixing with silver nitrate solution produces a white precipitate which is soluble in excess ammonium hydroxide

Give a chemical test to distinguish between the given pairs of chemicals:

Sodium chloride solution and Sodium nitrate solution

Explain why dilute hydrochloric acid cannot be concentrated by boiling beyond 22.2%.

Name the following:
Drying agent used to dry hydrogen chloride.

State the use of aqua-regia.

What is the function of HCI in preparation of aqua-regia?

Write balanced equcation for the following reaction:
Manganese (IV) oxide and concentrated hydrochloric acid.

Write a fully balanced of the following case :
Red lead is warmed with concentrated hydrochloric acid.

Write the balanced equation for the reaction of dilute hydrochloric acid with the following:

Iron

State which of the two - a solution of HCl in water or in toluene is an electrolyte. Explain.